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Basic Physics – Test 2


1. Materials for rain-proof coats and tents owe their water-proof properties to:

    A. surface tension.
    B. viscosity.
    C. specific gravity.
    D. elasticity.


2. Sound waves in air are:

    A. transverse.
    B. longitudinal.
    C. electromagnetic.
    D. polarise


3. In a mixture of hydrogen, oxygen, and nitrogen gases, the molecules having the greatest speed are those of:

    A. hydrogen.
    B. oxygen.
    C. nitrogen.
    D. helium.


4. The greenhouse gases that contribute to global warming absorb:

    A. more visible radiation than infrared.
    B. more infrared radiation than visible.
    C. visible and infrared about equally.
    D. very little radiation of any kind.


5. A cannonball is fired horizontally at 10 m/s from a cliff. Its speed one second after being fired is about:

    A. 10 m/s.
    B. 14 m/s.
    C. 16 m/s.
    D. 20 m/s.


6. When you drop a ball it accelerates at 9.8 m/s2. If you throw it downward, its acceleration immediately is:

    A. 9.8 m/s2.
    B. more than 9.8 m/s2.
    C. less than 9.8 m/s2.
    D. cannot say, unless the speed of throw is given.



    A. increases.
    B. decreases.
    C. remains largely unchanged.
    D. need more information.


8. As more lamps are connected in parallel in a circuit, the current in the power source:

    A. increases.
    B. decreases.
    C. remains the same.
    D. need more information.


9. The electrical force of attraction between an electron and a proton is greater on the:

    A. proton.
    B. electron.
    C. neither; both are the same.
    D. neutron.


10. When the color yellow is seen on your TV screen, the phosphors being activated on the screen are:

    A. mainly yellow.
    B. blue and red.
    C. green and yellow.
    D. red and green.












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